Magnetic coupling experimental device for natural gas pipeline

Abstract

The application relates to the technical field of natural gas pipeline experimental devices, in particular to a magnetic coupling experimental device for a natural gas pipeline, which comprises an experimental frame, an experimental pipeline is fixedly arranged in the experimental frame through a mounting frame, an auxiliary measuring cylinder is arranged on the outer surface of the experimental pipeline, a traction cylinder and a detection cylinder are arranged in the experimental pipeline respectively, the traction cylinder and the detection cylinder are connected through a guide rope, a plurality of locking plates are rotatably arranged on the outer surface of the traction cylinder, a recovery device is arranged between the locking plates and the traction cylinder, when the traction cylinder is blocked by sundries during movement in the experimental pipeline and cannot continue to move, the passive cylinder moves axially under the action of air pressure, drives the push rod, the extension rod and the locking plates to act in sequence, and then the stop block contacts the inner wall of the pipeline to form limiting friction, so that the traction cylinder is effectively prevented from overshooting or structural damage due to the continuous action of air pressure, and the safe and stable operation of the experimental device is ensured.

Description

Technical Field

[0001] This invention relates to the field of experimental devices for natural gas pipelines, specifically to a magnetic coupling experimental device for natural gas pipelines. Background Technology

[0002] During long-term operation, the structural integrity and internal fluid state monitoring of natural gas pipelines are directly related to transportation safety. In order to study the application of magnetic coupling detection technology in the field of pipeline inspection, it is usually necessary to simulate and verify the signal transmission characteristics under different pipeline materials, media conditions and airflow conditions through experimental devices.

[0003] Existing pipeline testing equipment mostly uses fixed or unidirectional airflow-driven methods for testing. Its structure can usually only realize the linear movement of the detection unit, and its simulation of airflow disturbance, obstacle influence, and changes in magnetic field transmission characteristics is relatively limited. During the experiment, if there are debris, particles, or foreign objects inside the pipeline, the detection cylinder or traction mechanism is very likely to get stuck, leading to experimental interruption or abnormal experimental data. Existing experimental equipment generally lacks effective obstacle detection and automatic removal structures, and usually requires manual disassembly of the pipeline for cleaning, which not only affects the continuity of the experiment, but may also cause deviations in the experimental data. Summary of the Invention

[0004] The purpose of this invention is to provide a magnetic coupling experimental device for natural gas pipelines to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a magnetic coupling experimental device for a natural gas pipeline, comprising an experimental frame, an experimental pipeline fixedly mounted inside the experimental frame via a mounting bracket, a simulated pump simulating the flow state of natural gas inside the experimental frame, the output end of the simulated pump being fixedly connected to the input end of the experimental pipeline, an auxiliary measuring cylinder sleeved on the outer surface of the experimental pipeline, a traction cylinder and a detection cylinder respectively disposed inside the experimental pipeline, the traction cylinder and the detection cylinder being connected by a guide rope, an electromagnetic receiving device disposed inside the detection cylinder, and multiple locking plates rotatably mounted on the outer surface of the traction cylinder, the locking plates being arranged in a ring, and a recovery device being disposed between the locking plates and the traction cylinder.

[0006] As a further embodiment of the present invention, a stopper is fixed on the outer surface of the locking plate. When the locking plate rotates away from the traction cylinder, the stopper contacts the inner wall of the experimental pipe and generates friction, thereby preventing the traction cylinder from continuing to move. A through hole is provided on the outer surface of the locking plate, and a balancer is inserted in the through hole. The balancer is connected to the locking plate through an auxiliary spring. By setting the stopper on the outer surface of the locking plate and utilizing the friction between the stopper and the inner wall of the experimental pipe, when the traction cylinder is subjected to abnormal air pressure or obstacle resistance, a limit brake can be formed in time to prevent the traction cylinder from continuing to move forward and avoid overshoot or structural damage.

[0007] As a further embodiment of the present invention, the recovery device includes a recovery membrane, the end of which is fixed to the end of the traction cylinder away from the detection cylinder, and the main body of the recovery membrane is wrapped around the outer surface of the traction cylinder. A plurality of shielding boxes are fixedly installed at the inner end of the traction cylinder, and a plurality of abutment rods are fixedly installed at the end of the recovery membrane. The abutment rods are arranged in a ring shape, and an abutment wheel is rotatably installed at the end of the abutment rod. The abutment wheel is in contact with the inner wall of the experimental pipe.

[0008] As a further embodiment of the present invention, a passive block is slidably installed on the inner end of the shielding box, an auxiliary line is fixedly connected to the outer surface of the abutting rod, and the free end of the auxiliary line passes around the central axis of the abutting wheel and is fixedly connected to the passive block. A collecting tube is fixedly installed on the inner end of the traction cylinder, and the shielding box is arranged around the collecting tube. A passive cylinder is sleeved on the outer surface of the collecting tube, and a sieve plate is fixedly welded to the inner end of the collecting tube.

[0009] As a further embodiment of the present invention, a plurality of push rods are fixedly installed on the outer surface of the passive cylinder, and the push rods are arranged in a ring. The end of the push rod away from the passive cylinder contacts the outer surface of the passive block. A reset line is fixedly connected to the outer surface of the push rod, and the end of the reset line is fixedly connected to the outer surface of the abutment rod. By setting a ring-shaped push rod structure on the outer surface of the passive cylinder, the passive cylinder can synchronously drive the passive block to produce coordinated movement when it moves axially, thereby realizing the linkage response of the internal mechanism of the traction cylinder.

[0010] As a further embodiment of the present invention, the passive cylinder and the collecting pipe are connected by a resistance spring. The outer surface of the passive cylinder is provided with multiple vent holes. When the passive cylinder moves toward the collecting pipe, the vent holes are blocked by the outer surface of the collecting pipe. A sealing cap is provided on the outer surface of the passive cylinder.

[0011] As a further embodiment of the present invention, a central rod is fixedly connected to the outer surface of the sieve plate, and the central rod is connected to the sealing cover by a return spring. The outer surface of the sealing cover is provided with multiple pressure relief holes, which are located inside the passive cylinder by default, so that the passive cylinder drives the sealing cover to move synchronously when it is under pressure, thereby achieving an effective response to changes in air pressure.

[0012] As a further embodiment of the present invention, the electromagnetic receiving device includes multiple matching blocks arranged in a ring on the outer surface of the detection cylinder, and the matching blocks are connected to the detection cylinder by spring contacts. By arranging the multiple matching blocks in a ring on the outer surface of the detection cylinder and using spring contact connections, the matching blocks can form a stable electromagnetic response structure on the outer surface of the detection cylinder, ensuring uniform reception and sensitivity of the magnetic signal.

[0013] As a further embodiment of the present invention, passive wheels are rotatably mounted on the outer surface of the matching block, a support ring is fixedly mounted on the inner end of the detection cylinder, and a vent pipe passes through the inner end of the support ring. Multiple receivers are fixedly mounted on the outer surface of the support ring, and the receivers are arranged in a ring. By setting passive wheels on the outer surface of the matching block, the frictional resistance can be reduced when the detection cylinder moves in the pipe, ensuring smooth movement. The support ring set on the inner end of the detection cylinder can play a fixing and supporting role, ensuring the coaxial stability of the internal structure. The vent pipe passing through the support ring can guide and balance the internal pressure when the airflow passes through.

[0014] As a further embodiment of the present invention, multiple traction rods are rotatably mounted on the outer surface of the vent pipe, and the ends of the traction rods are rotatably connected to the receiver. The receiver is equipped with a receiving coil inside, which is used to receive the induced current of the auxiliary measuring cylinder. By rotatably mounting multiple traction rods on the outer surface of the vent pipe and rotatably connecting the ends of the traction rods to the receiver, the receiver can be synchronously moved when the measuring cylinder is pushed by the airflow or changes position, ensuring that the receiving coil is always kept in the optimal magnetic field coupling position.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. When the device of the present invention is used, if the traction cylinder is blocked by debris and cannot continue to move when it moves in the experimental pipe, the passive cylinder will move axially under the action of air pressure, which will drive the push rod, extension rod and locking plate to move in sequence, so that the plug block contacts the inner wall of the pipe to form a limiting friction, thereby preventing the traction cylinder from overshooting or structural damage due to continuous air pressure, and ensuring the safe and stable operation of the experimental device.

[0017] 2. The structure in the device of the present invention can realize the entire process of obstacle detection, clearing, resetting and magnetic field coupling test without interfering with the airflow state, realistically reproduce the detection conditions of natural gas pipelines in complex operating environments, enhance the adaptability of the experimental device and the realism of experimental simulation, and provide a stable and reliable experimental verification platform for magnetic coupling detection technology.

[0018] 3. In the device of the present invention, the detection cylinder drives the internal receiver to move synchronously through the traction rod, which can carry out magnetic coupling experimental research in experimental pipelines of different materials and conditions. By adjusting the distance, offset angle and medium material parameters between the transmitting coil and the receiving coil, the magnetic field coupling strength, signal attenuation and energy transmission efficiency can be systematically analyzed, thereby providing accurate experimental data support for the optimized design of magnetic coupling detection technology for natural gas pipelines. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the magnetic coupling experimental setup.

[0020] Figure 2 This is a schematic diagram of the experimental pipe and reel structure;

[0021] Figure 3 This is a schematic diagram of the internal structure of the experimental pipeline;

[0022] Figure 4 This is a schematic diagram of the traction cylinder structure;

[0023] Figure 5 This is a disassembly diagram of the traction cylinder;

[0024] Figure 6 This is a schematic diagram of the locking plate and push rod.

[0025] Figure 7 This is a schematic diagram of the structure of the recycling membrane and the shielding box;

[0026] Figure 8 This is a schematic diagram of the internal structure of the collection tube;

[0027] Figure 9 This is a schematic diagram of the detection cylinder;

[0028] Figure 10 This is a schematic diagram of the internal structure of the detection cylinder;

[0029] Figure 11 This is a structural diagram of the support ring and the vent pipe;

[0030] Figure 12 This is a schematic diagram of the internal structure of the ventilator.

[0031] In the diagram: 1. Experimental frame; 2. Experimental piping; 3. Simulated pump; 4. Auxiliary measuring cylinder; 5. Traction rope; 6. Thread reel;

[0032] 101. Traction cylinder; 102. Recycling membrane; 103. Locking plate; 104. Auxiliary line; 105. Abutment wheel; 106. Balancer; 107. Auxiliary spring; 108. Extension rod; 109. Abutment rod; 110. Passive block; 111. Shielding box;

[0033] 201. Detection cylinder; 202. Guide rope; 203. Matching block; 204. Driven wheel; 205. Vent pipe; 206. Elastic telescopic rod; 207. Support ring; 208. Receiver; 209. Traction rod; 210. Stepper motor; 211. Reset wire; 212. Flow control plate;

[0034] 301. Resistance spring; 302. Passive cylinder; 303. Push rod; 304. Collection pipe; 305. Vent hole; 306. Sieve plate; 307. Shielding plate; 308. Center rod; 309. Return spring; 310. Sealing cover; 311. Pressure relief hole. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1: Please refer to Figures 1-4 A magnetic coupling experimental device for a natural gas pipeline includes an experimental frame 1. An experimental pipeline 2 is fixedly mounted inside the experimental frame 1 via a mounting bracket. A simulated pump 3 simulating the flow state of natural gas is also mounted inside the experimental frame 1, and the output end of the simulated pump 3 is fixedly connected to the input end of the experimental pipeline 2. An auxiliary measuring cylinder 4 is fitted on the outer surface of the experimental pipeline 2. A traction cylinder 101 and a detection cylinder 201 are respectively mounted inside the experimental pipeline 2, and the traction cylinder 101 and the detection cylinder 201 are connected by a guide rope 202.

[0037] Specifically, the experimental pipeline 2 is composed of multiple pipe sections connected together. These pipes have different materials, thicknesses, and inner and outer surface damage states to simulate the actual conditions of natural gas pipelines under different scenarios. The detection cylinder 201 also integrates modules such as electromagnetic sensors and transmitting coils. The detection cylinder 201 is also equipped with an electromagnetic receiving device. After high-frequency alternating current is applied to the transmitting coil, an alternating magnetic field will be formed around it. This magnetic field can penetrate non-ferromagnetic or ferromagnetic materials of a certain thickness. When the magnetic lines of force pass through the pipe wall and cut the receiving coil, the electromagnetic receiving device receives the induced current, thereby realizing contactless transmission of energy or signals. Two reels 6 are fixed to the outer surface of the experimental pipeline 2 by clamps. The auxiliary measuring cylinder 4 is located between the two. Each reel 6 is driven by a built-in hub motor. The two reels 6 are connected by a traction rope 5, and the auxiliary measuring cylinder 4 is fixed to the outer surface of the traction rope 5.

[0038] Multiple locking plates 103 are rotatably mounted on the outer surface of the traction cylinder 101. The locking plates 103 are arranged in a ring. To test the passability of the traction cylinder 101, obstacles such as stones are placed inside the pipe to simulate the possible jamming of the traction cylinder 101. A recovery device is provided between the locking plates 103 and the traction cylinder 101 to reduce experimental deviations caused by unnecessary friction.

[0039] like Figures 4-6 As shown, a plug is fixed to the outer surface of the locking plate 103. When the locking plate 103 rotates away from the traction cylinder 101, the plug contacts the inner wall of the experimental pipe 2 and generates friction, thereby preventing the traction cylinder 101 from moving further. A through hole is opened on the outer surface of the locking plate 103, and a balancer 106 is inserted through the through hole. The balancer 106 is connected to the locking plate 103 through an auxiliary spring 107. A movable abutment ball is provided at the end of the balancer 106 away from the locking plate 103. The pre-tightening force of the auxiliary spring 107 pushes the balancer 106, so that the abutment ball keeps in contact with the inner wall of the experimental pipe 2. The locking plate 103 arranged in a ring, through its synergistic effect, keeps the traction cylinder 101 always in the center position of the experimental pipe 2.

[0040] Example 2: Please refer to Figures 4-7 A magnetic coupling experimental device for a natural gas pipeline, based on Embodiment 1, includes a recovery device comprising a recovery membrane 102. One end of the recovery membrane 102 is fixed to the end of the traction cylinder 101 furthest from the detection cylinder 201, and the main body of the recovery membrane 102 wraps around the outer surface of the traction cylinder 101 (e.g., ...). Figure 4 As shown), multiple shielding boxes 111 are fixedly installed at the inner end of the traction cylinder 101, and multiple abutment rods 109 are fixedly installed at the end of the recovery membrane 102. The abutment rods 109 are arranged in a ring, and an abutment wheel 105 is rotatably installed at the end of the abutment rod 109. The abutment wheel 105 is in contact with the inner wall of the experimental pipe 2.

[0041] Specifically, the abutment wheel 105 is made of rubber and has a certain degree of elasticity. It also has an anti-slip layer on its outer surface. For the experimental pipe 2 with slight differences in diameter, its elastic material ensures that the abutment wheel 105 always keeps in contact with the pipe. The recycling membrane 102, with its smooth and wear-resistant surface, can effectively reduce friction when it comes into contact with the inner wall of the pipe, thereby ensuring that the recycling membrane 102 slides smoothly on the inner wall of the pipe.

[0042] like Figures 5-8 As shown, a passive block 110 is slidably mounted on the inner end of the shielding box 111. An auxiliary line 104 is fixedly connected to the outer surface of the abutment rod 109, and the free end of the auxiliary line 104 passes around the central axis of the abutment wheel 105 and is fixedly connected to the passive block 110. A guide wheel is rotatably mounted on the inner end of the shielding box 111. After the auxiliary line 104 passes through the shielding box 111, it is turned by the guide wheel and then connected to the passive block 110 in a "Z" shape (as shown). Figure 7 As shown), when the passive block 110 moves away from the locking plate 103, it pulls the abutment rod 109 through the auxiliary line 104, causing it to rotate around the center of the abutment wheel 105. This action first unfolds the recycling membrane 102 and puts it on the surface of the abutment wheel 105, and then makes it stick to the inner wall of the experimental pipe 2 under the continuous traction of the auxiliary line 104. Finally, it pushes the obstacle on the inner wall of the pipe during the movement.

[0043] A collection tube 304 is fixedly installed at the inner end of the traction tube 101, and a shielding box 111 is arranged around the collection tube 304. A passive tube 302 is sleeved on the outer surface of the collection tube 304. After the auxiliary line 104 pulls the abutment rod 109 to rotate, it first drives the recovery membrane 102 to wrap around the abutment wheel 105 and the obstacles attached thereto. Then, under the continuous traction of the auxiliary line 104, the outer surface of the abutment wheel 105 contacts the outer surface of the shielding box 111. At the same time, the end of the recovery membrane 102 moves to the position corresponding to the collection tube 304. Finally, the wrapped obstacle falls into the collection tube 304 here.

[0044] Specifically, the length of the side of the collecting tube 304 away from the passive cylinder 302 is greater than that of the shielding box 111. When the auxiliary line 104 pulls the recovery membrane 102, its port contacts the edge of the collecting tube 304. It is worth noting that the end of the collecting tube 304 away from the passive cylinder 302 is provided with multiple guide ports to guide the auxiliary line 104 so that it can drive the end of the recovery membrane 102 to complete the flipping and enter the interior of the collecting tube 304. The recovery membrane 102 can move obstacles and can carry larger obstacles away from the gaps in the experimental pipe 2, thereby effectively preventing the traction cylinder 101 from getting stuck during the movement.

[0045] A sieve plate 306 is fixedly welded to the inner end of the collecting pipe 304. Multiple rectangular holes are opened on the periphery of the sieve plate 306. The rectangular holes are arranged in a ring. A shielding plate 307 is rotatably installed in each of the multiple rectangular holes. The shielding plate 307 is engaged with the sieve plate 306 by a torsion spring and can only rotate in the direction of the collecting pipe 304. Before an obstacle enters the collecting pipe 304, it will first contact the surface of the shielding plate 307. Its thrust will push the shielding plate 307 open, and then the obstacle will finally fall into the collecting pipe 304.

[0046] like Figure 5 , Figure 7 , Figure 8 As shown, multiple push rods 303 are fixedly welded to the outer surface of the passive cylinder 302, and the push rods 303 are arranged in a ring. The end of the push rod 303 away from the passive cylinder 302 is in contact with the outer surface of the passive block 110. A reset line 211 is fixedly connected to the outer surface of the push rod 303. The end of the reset line 211 is fixedly connected to the outer surface of the abutment rod 109. An extension rod 108 is fixedly welded to the end of the locking plate 103 near the push rod 303. The push rod 303 is composed of a thick cylinder and a thin cylinder, which are connected by a tapered transition surface. The end of the extension rod 108 is in contact with the thinner cylindrical section of the push rod 303 by default.

[0047] The passive cylinder 302 is connected to the collection pipe 304 by a resistance spring 301. The outer surface of the passive cylinder 302 is provided with multiple vent holes 305. When the passive cylinder 302 moves toward the collection pipe 304, the vent holes 305 will be blocked by the collection pipe 304. A sealing cover 310 is provided on the outer surface of the passive cylinder 302. A central rod 308 is fixedly connected to the outer surface of the sieve plate 306 by bolts. The central rod 308 corresponds to the sealing cover 310. The central rod 308 and the sealing cover 310 are connected by a return spring 309.

[0048] Multiple pressure relief holes 311 are provided on the outer surface of the sealing cover 310. The pressure relief holes 311 are located inside the passive cylinder 302 by default. The spring force of the return spring 309 is greater than that of the resistance spring 301. At this time, the passive cylinder 302 continues to move until the sealing cover 310 contacts the center rod 308. Under the continuous movement of the passive cylinder 302, the sealing cover 310 is limited by the center rod 308. Finally, the pressure relief holes 311 are exposed outside the passive cylinder 302. It is worth noting that the traction cylinder 101 moves by airflow in the experimental pipe 2. If its movement is obstructed and stops, it will cause the air pressure behind it to accumulate. This accumulated air pressure will push the passive cylinder 302 to move.

[0049] like Figures 9-12As shown, the electromagnetic receiving device includes multiple matching blocks 203, which are arranged in a ring on the outer surface of the detection cylinder 201. The matching blocks 203 and the detection cylinder 201 are connected by spring sheets. A passive wheel 204 is rotatably mounted on the outer surface of each matching block 203. Under the action of the spring sheet, the passive wheel 204 is made to fit against the inner wall of the experimental pipe 2. A support ring 207 is fixedly installed at the inner end of the detection cylinder 201, and a vent pipe 205 passes through the inner end of the support ring 207. Multiple receivers 208 are fixedly installed on the outer surface of the support ring 207, and the receivers 208 are arranged in a ring.

[0050] Multiple traction rods 209 are rotatably mounted on the outer surface of the vent pipe 205. The ends of the traction rods 209 are rotatably connected to the receiver 208. The receiver 208 has a receiving coil inside, which is used to receive the induced current of the auxiliary measuring cylinder 4. An elastic telescopic rod 206 is fixedly installed on the inner end of the support ring 207. The telescopic end of the elastic telescopic rod 206 is fixedly connected to a stepper motor 210 by bolts. The output end of the stepper motor 210 is fixedly connected to a flow control plate 212. An isolation plate is fixed on the inner end of the vent pipe 205. Multiple rectangular holes are opened on the outer surfaces of the isolation plate and the flow control plate 212. The stepper motor 210 adjusts the cross area between the holes on the outer surfaces of the isolation plate and the flow control plate 212 by controlling the rotation angle of the flow control plate 212, thereby achieving precise control of the airflow.

[0051] It is worth noting that the gas can pass directly through the inside of the detection cylinder 201, but will not exert a significant thrust on the detection cylinder 201;

[0052] The elastic force of the return spring 309 and the resistance spring 301 is greater than the pressure of the gas flow.

[0053] The working principle of this invention is:

[0054] In use, the traction cylinder 101 and the detection cylinder 201 are placed inside the experimental pipeline 2. Then, gas is introduced into the experimental pipeline 2 through the simulated pump 3 to simulate the flow of natural gas in a real pipeline. As the gas flows, it passes through the detection cylinder 201 and then enters the traction cylinder 101. Since the gas can only enter through the exhaust hole 305 on the outer surface of the passive cylinder 302, the pressure on both sides of the traction cylinder 101 is unequal. Therefore, the traction cylinder 101 pulls the detection cylinder 201 to move under the action of pressure through the guide rope 202.

[0055] Subsequently, the alternating magnetic field emitted by the auxiliary measuring cylinder 4 is adjusted to control the stepper motor 210 inside the measuring cylinder 201, thereby controlling the rotation angle of the flow control plate 212. As the angle of the flow control plate 212 changes, the pressure in the gas region inside the measuring cylinder 201 changes when the gas flows through the vent pipe 205. At this time, the vent pipe 205 is displaced due to the pressure difference, which drives the receiver 208 to move through the traction rod 209. The measuring cylinder 201 moves within the experimental pipe 2 with various materials and conditions to simulate the real natural gas pipeline detection scenario. During the experiment, the distance between the transmitting coil and the receiving coil, the offset angle, and the medium material can be adjusted for research.

[0056] If debris appears inside the experimental pipe 2, the traction cylinder 101 will be stuck and unable to move. At this time, the air pressure around the passive cylinder 302 will accumulate. This accumulated air pressure will push the passive cylinder 302 to move and compress the resistance spring 301. During the movement of the passive cylinder 302, until the sealing cover 310 contacts the center rod 308, the return spring 309 will also be compressed. Under the continuous movement of the passive cylinder 302, the sealing cover 310 will be limited by the center rod 308, and finally the pressure relief hole 311 will be exposed outside the passive cylinder 302.

[0057] The passive cylinder 302 moves and drives the push rod 303 to move. At this time, the push rod 303 moves towards the shielding box 111. The end of the extension rod 108 first slides along the conical transition surface, and then transitions to the cylindrical section with a larger diameter. This process forces the extension rod 108 to move, which in turn pushes the locking plate 103 to rotate. Then, it contacts the inner wall of the experimental pipe 2 through the plug and generates friction, thereby preventing the traction cylinder 101 from continuing to move.

[0058] Subsequently, the auxiliary line 104 pulls the recovery membrane 102 so that its port contacts the edge of the collection tube 304, and drives the end of the recovery membrane 102 to flip and enter the inside of the collection tube 304, thereby realizing the transfer of obstacles. For obstacles with larger volume, the recovery membrane 102 can also carry them away from the gap between the traction cylinder 101 and the experimental pipe 2.

[0059] When the traction cylinder 101 is no longer stuck by debris, the passive cylinder 302 and the sealing cover 310 are restored to their initial state under the elastic force of the resistance spring 301 and the return spring 309. During the reset process, the push rod 303 pulls the abutment rod 109 and the recovery membrane 102 to their initial state through the reset line 211. Then the abutment wheel 105 re-contacts the inner wall of the experimental pipe 2, and the working conditions of the traction cylinder 101 are reset, and it can resume its movement under the action of airflow.

[0060] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A magnetic coupling experimental device for a natural gas pipeline, comprising an experimental frame (1), characterized in that: The experimental frame (1) is equipped with an experimental pipe (2) fixed inside by a mounting frame. The experimental frame (1) is also equipped with a simulation pump (3) that simulates the flow state of natural gas. The output end of the simulation pump (3) is fixedly connected to the input end of the experimental pipe (2). An auxiliary measuring cylinder (4) is fitted on the outer surface of the experimental pipe (2). A traction cylinder (101) and a detection cylinder (201) are respectively installed inside the experimental pipe (2). The traction cylinder (101) and the detection cylinder (201) are connected by a guide rope (202). An electromagnetic receiving device is also installed inside the detection cylinder (201). Multiple locking plates (103) are rotatably installed on the outer surface of the traction cylinder (101). The locking plates (103) are arranged in a ring. A recovery device is provided between the locking plates (103) and the traction cylinder (101). The recycling device includes a recycling membrane (102), the end of which is fixed to the end of the traction cylinder (101) away from the detection cylinder (201). A collection tube (304) is fixedly installed at the inner end of the traction cylinder (101), and a plurality of shielding boxes (111) are fixedly installed at the inner end of the traction cylinder (101). The shielding boxes (111) are arranged around the collection tube (304). A passive cylinder (302) is sleeved on the outer surface of the collection tube (304). The end of the recycling membrane (102) is fixedly installed with... There are multiple abutment rods (109), and auxiliary lines (104) are fixedly connected to the outer surface of the abutment rods (109). Multiple push rods (303) are fixedly installed on the outer surface of the passive cylinder (302), and the push rods (303) are arranged in a ring. During the rotation of the abutment rods (109), the outer surface of the abutment wheel (105) contacts the outer surface of the shield box (111), and at the same time, the end of the recycling membrane (102) moves to the position corresponding to the collection tube (304), and the wrapped obstacle falls into the collection tube (304) here.

2. The magnetic coupling experimental device for a natural gas pipeline according to claim 1, characterized in that: A plug is fixed on the outer surface of the locking plate (103). When the locking plate (103) rotates away from the traction cylinder (101), the plug contacts the inner wall of the experimental pipe (2) and generates friction, thereby preventing the traction cylinder (101) from moving further. A through hole is provided on the outer surface of the locking plate (103), and a balancer (106) is installed in the through hole. The balancer (106) is connected to the locking plate (103) through an auxiliary spring (107).

3. The magnetic coupling experimental device for a natural gas pipeline according to claim 1, characterized in that: The main body of the recycling membrane (102) is wrapped around the outer surface of the traction cylinder (101). The abutment rod (109) is arranged in a ring shape, and an abutment wheel (105) is rotatably installed at the end of the abutment rod (109). The abutment wheel (105) is in contact with the inner wall of the experimental pipe (2).

4. The magnetic coupling experimental device for a natural gas pipeline according to claim 3, characterized in that: The inner end of the shielding box (111) is slidably installed with a passive block (110), and the free end of the auxiliary line (104) is fixedly connected to the passive block (110) after passing around the central axis of the abutment wheel (105). The inner end of the collecting pipe (304) is fixedly connected with a sieve plate (306).

5. The magnetic coupling experimental device for a natural gas pipeline according to claim 4, characterized in that: The outer surface of the push rod (303) is fixedly connected to a reset line (211), and the end of the reset line (211) is fixedly connected to the outer surface of the abutment rod (109).

6. The magnetic coupling experimental device for a natural gas pipeline according to claim 5, characterized in that: The passive cylinder (302) and the collecting pipe (304) are connected by a resistance spring (301). The outer surface of the passive cylinder (302) is provided with multiple exhaust holes (305). When the passive cylinder (302) moves toward the collecting pipe (304), the exhaust holes (305) will be blocked by the outer surface of the collecting pipe (304). A sealing cap (310) is provided on the outer surface of the passive cylinder (302).

7. The magnetic coupling experimental device for a natural gas pipeline according to claim 6, characterized in that: A central rod (308) is fixedly connected to the outer surface of the sieve plate (306). The central rod (308) is connected to the sealing cover (310) by a return spring (309). The outer surface of the sealing cover (310) is provided with multiple pressure relief holes (311), which are located inside the passive cylinder (302).

8. The magnetic coupling experimental device for a natural gas pipeline according to claim 1, characterized in that: The electromagnetic receiving device includes multiple matching blocks (203), which are arranged in a ring on the outer surface of the detection cylinder (201), and the matching blocks (203) and the detection cylinder (201) are connected by springs.

9. The magnetic coupling experimental device for a natural gas pipeline according to claim 8, characterized in that: The outer surface of the matching block (203) is rotatably mounted with a passive wheel (204), the inner end of the detection cylinder (201) is fixedly mounted with a support ring (207), and the inner end of the support ring (207) is provided with a vent pipe (205). The outer surface of the support ring (207) is fixedly mounted with a plurality of receivers (208), and the receivers (208) are arranged in a ring.

10. The magnetic coupling experimental device for a natural gas pipeline according to claim 9, characterized in that: Multiple traction rods (209) are rotatably mounted on the outer surface of the vent pipe (205). The ends of the traction rods (209) are rotatably connected to the receiver (208). The receiver (208) is equipped with a receiving coil inside, which is used to receive the induced current of the auxiliary measuring tube (4).

Images